Outdated, conflicting and needless Magento modules

The list of modules, known to duplicate existing functionality of Magento 1.4.x.x and later versions. We do not recommend to install these modules.

Instead, it is preferred to use built-in functionality.

YoastMetarobots

In Magento 1.4.1.1 you can add default meta tags at System > Configuration > Design > HTML Head section. Every product also have own "meta" page at Catalog > Products > Product name > Meta information. So there is no necessity to install ﻿YoastMetarobots module.

Yoast CanonicalURLs

In Magento 1.4.x.x you can simply enable generation of Canonical URLs at System > Configuration > Web > Search Engine Optimization. Magenting installations have these options enabled by default.

Fooman Speedster

This module was designed for Magento 1.3 version. Magento 1.4.x.x provides nice Merge JS and Merge CSS options at System > Configuration > Advanced > Developer screen. Magenting installations have these options enabled by default. Minification can be done with Rissip_UIOptimization extension as described in Magento Performance Optimizations article.